Unveiling a delicate balance: New research shows that both too much and too little selenium and manganese in the blood can sharply increase the risk of death in asthma patients. Study: Association ...

A U.S. court has upheld Montana’s selenium standard for pollution in a border-crossing lake despite objections from a coal mine in southeastern B.C.

Higher maternal selenium levels during pregnancy were associated with a lower risk of streptococcal infections in children, suggesting a potential protective effect. Higher maternal selenium levels ...

Environmental engineers have developed critical methods to remove toxic selenium from water. Selenium is a critical element, particularly for the thyroid and immune system, but too little or too much ...

Kathy Le has more on the growing concerns after a new study found toxic levels of selenium in fish cause by long-term ...

When coal miners north of Fernie, British Columbia, blast into the mountains, the piles of rocks left behind leach selenium into the Elk River, which flows south into the Kootenai River. In small ...

For nearly 60 years, a strange chemical truce between two elements has shaped how scientists think about mercury in seafood.